From the course: Excel Business Intelligence: Power Pivot and DAX
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Recap: Calculated columns versus measures - Microsoft Excel Tutorial
From the course: Excel Business Intelligence: Power Pivot and DAX
Recap: Calculated columns versus measures
- All right, so at this point, we've talked about how DAX can be used in two different places, calculated columns and measures, both implicit and explicit. At the point, I want to take a big step back and compare the two. The reason it's worth focusing on this is that you'll find many situations where you could use either option. So it's important to understand the similarities and differences so that you know what your best choice might be. Now, starting with calculated columns, these are evaluated in the context of each row of the table to which they belong. In other words, they have row context. Second, they actually append static values, or attributes, to each row in the table and stores them with the model. So that increases the file size. Third, they're only recalculated on data source refresh or when you make changes to component columns, meaning columns that are actually included in the calculation that you're making. And then finally, these are primarily used as rows…
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Contents
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Introduction to Power Pivot and DAX29s
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Create a Power Pivot table5m 27s
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Power Pivots versus normal pivots2m 48s
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Introduction to Data Analysis Expressions (DAX)1m 12s
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Calculated columns8m 39s
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DAX measures2m 24s
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Create implicit measures1m 59s
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Create explicit measures (AutoSum)7m 8s
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Create explicit measures (Power Pivot)7m 42s
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Understand filter context9m 18s
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Step-by-step measure calculation12m 6s
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Recap: Calculated columns versus measures2m 29s
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Power Pivot best practices1m 48s
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